Carol Anne, I got pregnant whilst taking carbimazole. The doctors then switched me to propylthiouracil (aka PTU). this is considered a better drug during pregnancy as less crosses the placenta. Everything I’ve read about carbimazole talks of small risks of the drug affecting the baby’s thryroid (resulting in baby being born hypo), also, it is passed more easily in breast milk thanPTU. I think it was used commonly for pregnant women in the UK until PTU became available. Ask your doctor why you can’t have PTU, it is generally considered better than carbimazole. However, if he/she can’t prescribe PTU, don’t worry too much either. Penny.
Anonymous
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